It has about 500 000 people in the Central part, and 900 000 in the whole area. :-) And the size is harder for me to say, since I don't know what it is in your measurements.
No, that would be very difficult for me since I live in a small apartment. But I also totally lack planting skills, so even all my indoor plants are plastic. ;-)
Right now we have an unusually hot May. We've had about 25 degrees of Celsius for about a week now.
In July/August it's usually around 20-25 degrees of Celsius.